Patents by Inventor Masafumi Yamamoto

Masafumi Yamamoto has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20080125232
    Abstract: A boot for a joint, wherein an equal-diameter part and thick-walled parts are formed on the inner peripheral wall of a large diameter tube part. A first tapered part extending from the equal-diameter part is continued with a second tapered part formed at the thick-walled parts in the circumferential direction. The diameter reducing ends of the first tapered part and the second tapered part are located at the same position, and a thin-walled part engaged with an annular groove formed in the outer member of a constant-velocity joint is continued with the diameter reducing end.
    Type: Application
    Filed: November 18, 2004
    Publication date: May 29, 2008
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Masafumi Yamamoto, Seiichi Sekito, Hideki Kobayashi, Yuuki Miyashita
  • Publication number: 20080120078
    Abstract: A modeling device is disclosed that easily projects characteristic information obtained from an object onto a differently-shaped object, even if the object, from which the characteristic information is obtained, has a complex shape. A modeling device in one embodiment of the present invention includes a virtually electrifying section to calculate an electric potential at a spot in a heart at the time when a predetermined voltage is applied to the heart, and a projecting section to project a fiber orientation onto a heart model created on the basis of shape information that is input to the input section. The projecting section specifies a spot to be a target of projection on the basis of the electric potential obtained by the virtually electrifying section. Use of the electric potential in specifying the spot makes it possible to easily project the fiber orientation onto any heart having complex and various shapes.
    Type: Application
    Filed: January 25, 2006
    Publication date: May 22, 2008
    Inventors: Toshiaki Hisada, Hiroshi Kurokawa, Nobuhiko Oshida, Masafumi Yamamoto, Takumi Washio, Jun-ichi Okada, Hiroshi Watanabe, Seiryo Sugiura
  • Publication number: 20070254247
    Abstract: A radiation-sensitive resin composition comprising (A) a resin which comprises at least one recurring unit (I-1), (I-2), or (I-3), and a recurring unit (II), and is insoluble or scarcely soluble in alkali, but becomes alkali soluble by action of an acid, (B) a photoacid generator, and (C) a polycyclic compound. The resin composition is used as a chemically-amplified resist for microfabrication utilizing deep UV rays.
    Type: Application
    Filed: November 9, 2005
    Publication date: November 1, 2007
    Inventors: Masafumi Yamamoto, Hidemitsu Ishida, Hiroyuki Ishii, Toru Kajita
  • Patent number: 7202016
    Abstract: A chemically amplified radiation-sensitive resin composition comprising a specific copolymer and a photoacid generator, wherein the copolymer contains the following recurring unit (1) and/or the recurring unit (2), and the recurring unit (3-1), wherein R1 is a hydrogen or methyl, R2 is a C4-10 tertiary alkyl, R3 and R4 are a hydrogen, C1-12 alkyl, C6-15 aromatic, C1-12 alkoxyl, or R3 and R4 may form, in combination and together with the nitrogen atom with which the R3 and R4 groups bond, a C3-15 cyclic structure, provided that R3 and R4 are not a hydrogen atom at the same time. The composition effectively responds to various radiations, exhibits excellent resolution and pattern configuration and minimal iso-dense bias, and can form fine patterns at a high precision and in a stable manner.
    Type: Grant
    Filed: April 28, 2005
    Date of Patent: April 10, 2007
    Assignee: JSR Corporation
    Inventors: Masaaki Miyaji, Tomoki Nagai, Yuji Yada, Jun Numata, Yukio Nishimura, Masafumi Yamamoto, Hiroyuki Ishii, Toru Kajita, Tsutomu Shimokawa
  • Patent number: 7144675
    Abstract: A radiation-sensitive resin composition comprising (A) a resin comprising at least two recurring units of the formulas (1)–(6) in the total amount of 5–70 mol %, but each in the amount of 1–49 mol %, the resin being insoluble or scarcely soluble in alkali, but becoming easily soluble in alkali by the action of an acid, and (B) a photoacid generator. wherein R1 is a hydrogen or methyl and R2 is a substituted or unsubstituted alkyl group having 1–4 carbon atoms. The resin composition is useful as a chemically amplified resist having high transmittance of radiation, sensitivity, resolution, dry etching resistance, and pattern profile.
    Type: Grant
    Filed: August 27, 2003
    Date of Patent: December 5, 2006
    Assignee: JSR Corporation
    Inventors: Motoyuki Shima, Hiroyuki Ishii, Masafumi Yamamoto, Daichi Matsuda, Atsushi Nakamura
  • Patent number: 7108955
    Abstract: A novel polysiloxane having high transparency to radiations with a wavelength of 193 nm or less, particularly 157 nm or less, and exhibiting superior dry etching resistance and a radiation-sensitive resin composition comprising the polysiloxane exhibiting superior sensitivity, resolution, and the like are provided. The polysiloxane is a resin having the structural unit (I) and/or structural unit (II) of the following formula (1), and having an acid-dissociable group, wherein R1 represents a monovalent aromatic group substituted with a fluorine atom or a fluoroalkyl group or a monovalent aliphatic group substituted with a fluorine atom or a fluoroalkyl group and R2 represents the above a monovalent aromatic group, the above monovalent aliphatic group, a hydrogen atom, a monovalent hydrocarbon group, haloalkyl group, or amino group.
    Type: Grant
    Filed: April 30, 2002
    Date of Patent: September 19, 2006
    Assignee: JSR Corporation
    Inventors: Haruo Iwasawa, Akihiro Hayashi, Tsutomu Shimokawa, Masafumi Yamamoto
  • Publication number: 20060184848
    Abstract: The logic integrated circuit comprises a logic circuit having the predetermined logic functions, a read/write memory circuit, a test circuit for testing whether fail bit is included in the memory circuit or not, and a boundary latch circuit formed of a plurality of flip-flop circuits which are capable of latching signals between said logic circuit and said memory circuit and also forming a shift register. Moreover, the logic integrated circuit is further provided with a fail relief information generating circuit for storing test result to the boundary latch circuit during execution of the test with the test circuit and generating the fail relief information for relieving fail of said memory circuit based on the stored test result. The test circuit mounted on the logic integrated circuit can generate the information for relieving fail bit in parallel with the test of a built-in memory circuit and can also output the same information to external side and relieve the RAM within a chip.
    Type: Application
    Filed: January 20, 2006
    Publication date: August 17, 2006
    Inventors: Mitsuo Serizawa, Kaname Yamasaki, Masafumi Yamamoto, Kazuo Kato
  • Patent number: 7078148
    Abstract: A radiation-sensitive resin composition comprising: (A) a resin comprising a hydroxyl group or carboxyl group, of which the hydrogen atom has been replaced by an acid-dissociable group possessing an alkali dissolution controlling capability, the resin increasing the solubility in an alkaline aqueous solution when the acid-dissociable group dissociates, and a photoacid generator comprising (B-1) a sulfonium salt represented by 1-(3,5-dimethyl-4-hydroxyphenyl)tetrahydrothiophenium perfluoro-n-octanesulfonate and 1-(4-n-butoxy-1-naphthyl)tetrahydrothiophenium nonafluoro-n-butanesulfonate and (B-2) a sulfonium salt represented by triphenylsulfonium nonafluoro-n-butanesulfonate. The radiation-sensitive resin composition useful as a novel chemically amplified resist exhibiting excellent sensitivity and resolution to deep ultraviolet rays typified by an ArF excimer laser, superior pattern shape-forming capability, and the like.
    Type: Grant
    Filed: May 29, 2003
    Date of Patent: July 18, 2006
    Assignee: JSR Corporation
    Inventors: Motoyuki Shima, Hiroyuki Ishii, Atsushi Nakamura, Masafumi Yamamoto
  • Patent number: 7005230
    Abstract: A radiation-sensitive resin composition comprising (A) a resin which comprises at least one recurring unit (I-1), (I-2), or (I-3), and a recurring unit (II), and is insoluble or scarcely soluble in alkali, but becomes alkali soluble by action of an acid, (B) a photoacid generator, and (C) a polycyclic compound.
    Type: Grant
    Filed: January 16, 2003
    Date of Patent: February 28, 2006
    Assignee: JSR Corporation
    Inventors: Masafumi Yamamoto, Hidemitsu Ishida, Hiroyuki Ishii, Toru Kajita
  • Patent number: 6964840
    Abstract: A radiation-sensitive resin composition comprising an acid-labile group-containing resin and a photoacid generator is disclosed. The resin has a structure of the formula (1), wherein R1 represents a hydrogen atom, a monovalent acid-labile group, an alkyl group having 1-6 carbon atoms which does not have an acid-labile group, or an alkylcarbonyl group having 2-7 carbon atoms which does not have an acid-labile group, X1 represents a linear or branched fluorinated alkyl group having 1-4 carbon atoms, and R2 represents a hydrogen atom, a linear or branched alkyl group having 1-10 carbon atoms, or a linear or branched fluorinated alkyl group having 1-10 carbon atoms. The resin composition exhibits high transmittance of radiation, high sensitivity, resolution, and pattern shape, and is useful as a chemically amplified resist in producing semiconductors at a high yield.
    Type: Grant
    Filed: June 16, 2004
    Date of Patent: November 15, 2005
    Assignees: JSR Corporation, International Business Machines Corporation
    Inventors: Yukio Nishimura, Noboru Yamahara, Masafumi Yamamoto, Toru Kajita, Tsutomu Shimokawa, Hiroshi Ito
  • Publication number: 20050214680
    Abstract: A chemically amplified radiation-sensitive resin composition comprising a specific copolymer and a photoacid generator, wherein the copolymer contains the following recurring unit (1) and/or the recurring unit (2), and the recurring unit (3-1), wherein R1 is a hydrogen or methyl, R2 is a C4-10 tertiary alkyl, R3 and R4 are a hydrogen, C1-12 alkyl, C6-15 aromatic, C1-12 alkoxyl, or R3 and R4 may form, in combination and together with the nitrogen atom with which the R3 and R4 groups bond, a C3-15 cyclic structure, provided that R3 and R4 are not a hydrogen atom at the same time. The composition effectively responds to various radiations, exhibits excellent resolution and pattern configuration and minimal iso-dense bias, and can form fine patterns at a high precision and in a stable manner.
    Type: Application
    Filed: April 28, 2005
    Publication date: September 29, 2005
    Inventors: Masaaki Miyaji, Tomoki Nagai, Yuji Yada, Jun Numata, Yukio Nishimura, Masafumi Yamamoto, Hiroyuki Ishii, Toru Kajita, Tsutomu Shimokawa
  • Patent number: 6933094
    Abstract: A chemically amplified radiation-sensitive resin composition comprising a specific copolymer and a photoacid generator, wherein the copolymer contains the following recurring unit (1) and/or the recurring unit (2), and the recurring unit (3-1), wherein R1 is a hydrogen or methyl, R2 is a C4-10 tertiary alkyl, R3and R4 are a hydrogen, C1-12 alkyl, C6-15 aromatic, C1-12 alkoxyl, or R3 and R4 may form, in combination and together with the nitrogen atom with which the R3 and R4 groups bond, a C3-15 cyclic structure, provided that R3 and R4 are not a hydrogen atom at the same time. The composition effectively responds to various radiations, exhibits excellent resolution and pattern configuration and minimal iso-dense bias, and can form fine patterns at a high precision and in a stable manner.
    Type: Grant
    Filed: September 18, 2001
    Date of Patent: August 23, 2005
    Assignee: JSR Corporation
    Inventors: Masaaki Miyaji, Tomoki Nagai, Yuji Yada, Jun Numata, Yukio Nishimura, Masafumi Yamamoto, Hiroyuki Ishii, Toru Kajita, Tsutomu Shimokawa
  • Patent number: 6838225
    Abstract: A radiation-sensitive resin composition comprising: (A) an acid-dissociable group-containing resin, insoluble or scarcely soluble in alkali but becoming soluble in alkali when the acid-dissociable group dissociates, and containing recurring units with specific structures and (B) a photoacid generator of the formula (3), wherein R5 represents a monovalent aromatic hydrocarbon group, m is 1-8, and n is 0-5. The resin composition is suitable as a chemically-amplified resist responsive to deep ultraviolet rays such as a KrF excimer laser and ArF excimer laser, exhibits high transparency, excellent resolution, dry etching resistance, and sensitivity, produces good pattern shapes, and well adheres to substrates.
    Type: Grant
    Filed: January 16, 2002
    Date of Patent: January 4, 2005
    Assignee: JSR Corporation
    Inventors: Yukio Nishimura, Masafumi Yamamoto, Atsuko Kataoka, Toru Kajita
  • Publication number: 20040241580
    Abstract: A radiation-sensitive resin composition comprising an acid-labile group-containing resin and a photoacid generator is disclosed.
    Type: Application
    Filed: June 16, 2004
    Publication date: December 2, 2004
    Inventors: Yukio Nishimura, Noboru Yamahara, Masafumi Yamamoto, Toru Kajita, Tsutomu Shimokawa, Hiroshi Ito
  • Patent number: 6800414
    Abstract: A radiation-sensitive resin composition comprising an acid-labile group-containing resin and a photoacid generator is disclosed. The resin has a structure of the formula (1), wherein R1 represents a hydrogen atom, a monovalent acid-labile group, an alkyl group having 1-6 carbon atoms which does not have an acid-labile group, or an alkylcarbonyl group having 2-7 carbon atoms which does not have an acid-labile group, X1 represents a linear or branched fluorinated alkyl group having 1-4 carbon atoms, and R2 represents a hydrogen atom, a linear or branched alkyl group having 1-10 carbon atoms, or a linear or branched fluorinated alkyl group having 1-10 carbon atoms. The resin composition exhibits high transmittance of radiation, high sensitivity, resolution, and pattern shape, and is useful as a chemically amplified resist in producing semiconductors at a high yield.
    Type: Grant
    Filed: June 14, 2001
    Date of Patent: October 5, 2004
    Assignee: JSR Corporation
    Inventors: Yukio Nishimura, Noboru Yamahara, Masafumi Yamamoto, Toru Kajita, Tsutomu Shimokawa, Hiroshi Ito
  • Publication number: 20040146802
    Abstract: A radiation-sensitive resin composition comprising (A) a resin which comprises at least one recurring unit (I-1), (I-2), or (I-3), and a recurring unit (II), and is insoluble or scarcely soluble in alkali, but becomes alkali soluble by action of an acid, (B) a photoacid generator, and (C) a polycyclic compound. The resin composition is used as a chemically-amplified resist for microfabrication utilizing deep UV rays.
    Type: Application
    Filed: January 16, 2003
    Publication date: July 29, 2004
    Inventors: Masafumi Yamamoto, Hidemitsu Ishida, Hiroyuki Ishii, Toru Kajita
  • Publication number: 20040143082
    Abstract: A novel polysiloxane having high transparency to radiations with a wavelength of 193 nm or less, particularly 157 nm or less, and exhibiting superior dry etching resistance and a radiation-sensitive resin composition comprising the polysiloxane exhibiting superior sensitivity, resolution, and the like are provided.
    Type: Application
    Filed: October 31, 2003
    Publication date: July 22, 2004
    Inventors: Haruo Iwasawa, Akihiro Hayashi, Tsutomu Shimokawa, Masafumi Yamamoto
  • Patent number: 6756180
    Abstract: Acid-catalyzed positive resist compositions which are imageable with 193 nm radiation (and possibly other radiation) and are developable to form resist structures of improved development characteristics, improved etch resistance, and reduced post-exposure bake sensitivity are enabled by the use of resist compositions containing an imaging polymer having cyclic olefin monomeric units respectively having pendant, acid-labile protecting moieties, lactone moieties and fluoroalcohol moieties. The lactone moiety is preferably a pendant lactone ester.
    Type: Grant
    Filed: October 22, 2002
    Date of Patent: June 29, 2004
    Assignee: International Business Machines Corporation
    Inventors: Wenjie Li, Pushkara Rao Varanasi, Masafumi Yamamoto
  • Publication number: 20040076903
    Abstract: Acid-catalyzed positive resist compositions which are imageable with 193 nm radiation (and possibly other radiation) and are developable to form resist structures of improved development characteristics, improved etch resistance, and reduced post-exposure bake sensitivity are enabled by the use of resist compositions containing an imaging polymer having cyclic olefin monomeric units respectively having pendant, acid-labile protecting moieties, lactone moieties and fluoroalcohol moieties. The lactone moiety is preferably a pendant lactone ester.
    Type: Application
    Filed: October 22, 2002
    Publication date: April 22, 2004
    Applicants: International Business Machines Corporation, JSR Corporation
    Inventors: Wenjie Li, Pushkara Rao Varanasi, Masafumi Yamamoto
  • Publication number: 20040048192
    Abstract: A radiation-sensitive resin composition comprising (A) a resin comprising at least two recurring units of the formulas (1)-(6) in the total amount of 5-70 mol %, but each in the amount of 1-49 mol %, the resin being insoluble or scarcely soluble in alkali, but becoming easily soluble in alkali by the action of an acid, and (B) a photoacid generator.
    Type: Application
    Filed: August 27, 2003
    Publication date: March 11, 2004
    Inventors: Motoyuki Shima, Hiroyuki Ishii, Masafumi Yamamoto, Daichi Matsuda, Atsushi Nakamura